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Lettera Patent No. 67,856, dated August 20, 1867; antedatcol August l1, 1867.

IMPROVEMENT IIIl MOULDERS FI'ASKS.

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TO WHOM IT MAY CQNCERN:

Be it known that I, MATTHEW M. DOXNELLY, oi' Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Moulders Flasks; and I 'do hereby declare `the followingto bea full, clear, and 'exact description thereof, reference being had to thc accompanying drawings, making a part of this specification.

This invention relates to an improved construction of the guide-pins of a moulders lask, which enables themto be set up as they wear, so as to insure the accurate coming together of the several parts of the`mould, and to avoid unsightly'and injurious faults. fins, or scams at the parting line of the casting.

Figure I is a perspective view of a Inoulders Hasi; provided with my improveuient.

Figure 2 is an axial section through the guide`pin and lug.

Figure 3 represents the dci'ce for holding and grasping the pin for securing the same accurately in its lug.

I have selected for illustration a cylindrical flask, such as is employed for moulding fly-wheels and other circular objects. Y l

A is the drag'and B the cope, the lattea` havingrwings C, whichserve the twofold purpose of handles, whereby to lift the cope and flask, and to contain the guide notches D'. The guide-pins E, instead of being cast solidly to the drag, are secured to it in the following manner:` F are lugs, which project laterally fromthe drag, and have doubly countersunk oyesf. That portion of the guide-pinV E whichis containedin the lu` has a contraction or waist, e, each guide-pin being confined on opposite sides of a gauge, G, a portion of which is shown in fig. 3. Lead or other fusible meta-l is cast into the annular space includedbetween the lug and the narrowed portion of the `pin. d v

The pins having been thus accurately cast in place the drag is removed from oil' the gauge and is ready for use. Whenever the guiding surfaces are so worn' as to impair the accuracy of the t, one or both guide-pins may be set inward with the utmost nicety by thc use of a drift, I-I, on th'surl'ace of the soft-metal lling around the pin. i

I claim the combination of the lug'F with its countersunk hole, j', lin combination with-the pin E, with its waist,v e, when the tivo are united and held together by soft metal, in the manner described.

4In testimony of which invention I hereunto set myhand.

MATTHEW M. DONNELLY.

Witnesses:

GEO. H. KNIGHT, JAMES H. LAYMAN. 

